CN102287854B - Afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy-cooling device - Google Patents

Abstract

The invention relates to an afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy-cooling device, which relates to oilfield oil-production equipment and comprises a precombustion-chamber shell (1), a precombustion-chamber middle lining (2) and a precombustion-chamber inside lining (3). A water-cooling sleeve (6) is formed between the precombustion-chamber shell (1) and the middle lining (2), an air-cooling sleeve (7) is formed between the precombustion-chamber middle lining (2) and the inside lining (3), the inner wall of the air-cooling sleeve is provided with a plurality of tangential air nozzles (8), and air is sprayed out from the nozzles (8) and contacted with the surface of fuel gas on the inside lining to form a continuous air film to cool a precombustion chamber. Cooling water is forced to flow through the water-cooling sleeve (6) to carry out regenerative cooling for the heated air in the air-cooling sleeve and implement redundancy cooling for the high-temperature fuel gas. In the invention, the burning-loss and damage problems of the inside lining of a steam-injecting generator are solved by a method of improving an equipment structure and a cooling mode.

Description

The Afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy cooling device

Technical field

The present invention relates to a kind of oil field equipment, particularly relate to the redundancy-cooling device of a kind of compensation combustion type supercritical pressure steam injection vapour generator (claiming again composite heat carrier generator) combustion chamber.

Background technology

Each elephants such as the grand celebration at home of steam injection generator, the Liaohe River, triumph, Xinjiang have carried out using for many years, and have obtained certain oil increasing effect, but its scope of application mainly concentrates on shallow oil reservoir and high infiltration oil reservoir in the past.continuous progress along with oil field development, the existing composite heat carrier generator of China, as patent 98203951.4 " composite heat carrier generator of swirl atomizer ", " 98203949.2 composite heat carrier generator ", " 98203950.6 the composite heat carrier generator with vaporizer ", 02231765.1 " gas steam generator " and 200510022594.7 " high-temperature high-pressure combustion system of sub-critical composite heat carrier generator " etc. can't adapt to the needs of current field produces, therefore, must develop larger flow, the supercritical pressure steam injection vapour generator of high pressure more.

Yet, being accompanied by the raising of steam injection generator flow, pressure and temperature, the new technical problem that needs to be resolved hurrily has appearred again, and one of them is exactly steam injection generator liner scaling loss, breaking-up problem.

in published Generator Design, the cooling regeneration type of cooling that spiral or rod-type cooling jacket are set in burning chamber shell that all adopts of steam injection generator combustion chamber, but when the generator chamber pressure improves, and the equipment flow is large, and continuously during long-term work, along with the composite heat carrier increase in temperature, for making equipment blending water keep having the saturation state of certain steam quality, its watering quantity will reduce gradually, original inner lining structure can't satisfy the requirement of working environment, often occur liner at the flame front place scaling loss in the form of a ring, the phenomenons such as breaking-up, thereby had a strong impact on the steam injection generator in the normal use of mid-deep strata main force oil reservoir.Particularly when generator when supercritical pressure is worked, because there is large specific heat region in cooling working medium water, its volume is larger with working conditions change in this district, the heat transfer deterioration phenomenon very easily occurs in equipment, and and then burns combustion chamber liner, damage equipment.Therefore, must take measures to reduce and control high-temperature fuel gas to the heat transfer total amount of cooling medium, namely substantive breakthroughs being carried out in the design of the cooling liner in existing generator combustion chamber and improved.

Summary of the invention

the object of the present invention is to provide a kind of Afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy cooling device, namely (will originally concentrate near top of combustion chamber disposable burning and be divided into pre-burning burning and afterburning two parts of burning) on the basis that changes existing generator combustion system, by improving the structure of cooling device, original single regeneration type of cooling is changed into liner cooling with the air air film, middle lining is cooling with water reuse (treatment, and, the air air film is cooled to the master, water reuse (treatment is cooled to the auxiliary redundancy type of cooling, thereby improve the liner cooling effect, the extension device working life.

The objective of the invention is to be achieved through the following technical solutions:

The Afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy cooling device is made of lining, precombustion chamber liner in precombustion chamber housing, precombustion chamber.Wherein, the front/rear end of precombustion chamber housing adopts inner conical (or spherical); In precombustion chamber, lining and liner outer rim are provided with multi-head spiral groove, and the inwall of precombustion chamber liner is provided with a plurality of tangential nozzles; The precombustion chamber liner is plugged in middle lining endoporus, and weld (or other affixed mode) by tail end and connect, but pressure bearing and seal; The weld assembly of precombustion chamber liner and middle lining is plugged in the precombustion chamber housing; The helical duct that forms between precombustion chamber liner and middle lining consists of cooling air jacket, and the helical duct that forms between lining and housing in precombustion chamber consists of water(-cooling) jacket.

Described Afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy cooling device, remaining air except being used for precombustion chamber poor oil firing required air all enters cooling air jacket via cooling air intake, spray into precombustion chamber by a plurality of tangential nozzle on the cooling air jacket inwall, form continuous air film on the cooling air jacket inwall, and absorb the heat preheating self in combustion gas in this process.

Described Afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy cooling device; the required cooling water of precombustion chamber all enters water(-cooling) jacket via the cooling water inlet; regenerate cooling to the heated air in cooling air jacket; and cooling when not good at air film, the protection precombustion chamber is not damaged.

Advantage of the present invention and effect are:

By the breaking-up of existing equipment scaling loss and phenomenon are observed, analyzed and calculate, the present invention has improved device structure and the type of cooling, and has solved the liner burning problems of steam injection generator with this.

1, in the combustion chamber, cooling air jacket is set, it is cooling that the use air carries out air film.

In the steam injection generator course of work, its burning required air is divided into two-way and is pressed in the combustion chamber.Wherein, the one road supplies with precombustion chamber, is directly used in poor oil firing; The precombustion chamber cooling air jacket is supplied with on another road, sprays into precombustion chamber by being arranged at a plurality of tangential small-holes that are lining with in it, forms continuous air film on the cooling air jacket inwall.Because this air film has separated high-temperature fuel gas and inwall, and constantly absorb fuel gas calorie in flow process, reduced fuel gas temperature and combustion gas than enthalpy, thereby, improved the protection effect, effectively avoided liner scaling loss or breaking-up.Simultaneously, owing in this process, the air that has neither part nor lot in burning having been carried out effective preheating, the related efficiency of combustion that improves next step afterburning stage also.

The cooling outstanding feature of air film is under any condition (being included in the supercritical pressure condition of work), can not produce the heat transfer deterioration phenomenon as water cooling, scaling loss or the breaking-up of effectively having avoided generator to cause because of heat transfer deterioration under the supercritical pressure condition of work.

2, cooling air jacket arranges water(-cooling) jacket outward, forms redundancy cooling, avoids heat transfer deterioration.

When generator was worked, cooling water pressure entered water(-cooling) jacket, forced mobilely in its helical duct, and it is cooling that the own heated air in cooling air jacket is regenerated, thereby further strengthened cooling effect, and it is cooling to have formed redundancy.Meanwhile, because of the cooling protection near the gas-air air film, the regeneration cooling water temperature in water(-cooling) jacket has also obtained effective control, thereby has avoided the heat transfer deterioration phenomenon to produce.

Description of drawings

Fig. 1 is precombustion chamber cooling system schematic diagram of the present invention.

The specific embodiment

The present invention is described in detail below with reference to Fig. 1.

Compensation combustion type supercritical pressure combustion gas liquid two-phase fuel steam injection generator combustion-chamber redundancy-cooling device by serve as acontrast 2 inprecombustion chamber housing 1, precombustion chamber,precombustion chamber liner 3 consists of.Wherein, front end face 4 and therear end face 10 ofprecombustion chamber housing 1 are inner conical, by screwed flange, the stud bolt an nut on adpting flange screw thread 5 onprecombustion chamber housing 1 andflange screw thread 9, respectively with the spherical end surface press seal of the precombustion chamber ejector filler housing that is positioned at its rear and front end and afterburning ejector filler housing.In precombustion chamber,lining 2 outer rims are provided with multi-head spiral groove.Precombustion chamber liner 3 outer rims also are provided with multi-head spiral groove, and its inwall is provided with a plurality of tangential nozzles 8.Precombustion chamber liner 3 is plugged inmiddle lining 2 endoporus, both is welded to connect by tail end, but and pressure bearing and seal.The helical duct that consists of betweenprecombustion chamber liner 3 andmiddle lining 2 is cooling air jacket 7, and the helical duct that consists of betweenlining 2 andhousing 1 in precombustion chamber is water(-cooling) jacket 6.The weld assembly ofprecombustion chamber liner 3 andmiddle lining 2 is plugged inprecombustion chamber housing 1.

The course of work of the present invention:

In compensation combustion type supercritical pressure steam injection vapour generator when normal operation,, its burning required air is divided into two-way in the pre-burning ejector filler, and wherein one the tunnel carries out poor oil firing after directly spraying into precombustion chamber and the fuel blending that sprays into; Another road all enters cooling air jacket 7; spray into precombustion chamber via a plurality of tangential nozzle 8 on coolingair jacket liner 3; form continuous air film within it on wall; prevent that flame from directly contacting with the cooling air jacket inwall, simultaneously, by the blending heat absorption of this part air; progressively reduce fuel gas temperature and combustion gas and compare enthalpy; thereby multi-faceted protection inner lining structure, the comprehensive protection effect that improves is further avoided liner scaling loss or breaking-up.In addition, owing in this process, the air that has neither part nor lot in burning having been carried out effective preheating, the related efficiency of combustion that improves next step afterburning stage.

For further improving the cooling effect of precombustion chamber, strengthen security protection, set up again water(-cooling) jacket 6 at the outer surface of above-mentioned cooling air jacket 7, it is regenerated cooling.When generator is worked; cooling water enters precombustion chamber water(-cooling) jacket 6; force mobile in spirality channel; and carry out cooling to the heated air in cooling air jacket; with further enhancing cooling effect, simultaneously, in case air film is cooling when not good; by the cooling redundancy protecting that carries out of regenerating, intact to guarantee device security.

Claims (1)

1. the Afterburning-type supercritical-pressure gas-liquid fuel-generator combustion-chamber redundancy cooling device, be made of lining, precombustion chamber liner in precombustion chamber housing, precombustion chamber, it is characterized in that, the front/rear end of precombustion chamber housing (1) adopts inner conical; In precombustion chamber, lining (2) and liner (3) outer rim are provided with multi-head spiral groove, and the inwall of precombustion chamber liner (3) is provided with a plurality of tangential nozzles (8); Precombustion chamber liner (3) is plugged in middle lining (2) endoporus, adopts tail end welding or alternate manner affixed, is the pressure bearing and seal shape; The weld assembly of precombustion chamber liner (3) and middle lining (2) is plugged in precombustion chamber housing (1); Form helical duct between precombustion chamber liner (3) and middle lining (2), consist of cooling air jacket, form helical duct between lining (2) and housing (1) in precombustion chamber, consist of water(-cooling) jacket; Be used for the outer remaining air of precombustion chamber poor oil firing's required air and all enter cooling air jacket (7) through cooling air intake, spray into precombustion chamber by a plurality of tangential nozzle (8) on the cooling air jacket inwall, form continuous air film on the cooling air jacket inwall, and absorb the heat preheating self in combustion gas in this process; The required cooling water of precombustion chamber all enters water(-cooling) jacket (6) via the cooling water inlet, regenerates cooling to the heated air in cooling air jacket (7).

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